var G_jingzong_data = {
    "ReturnMessage": "取数据成功",
    "StyleItems": [
        {
            "StyleID": 1,
            "Style": "单项选择题",
            "Explain": "单项选择题",
            "Score": 1,
            "Type": "ATEST",
            "TestCount": 5,
            "TestItems": [
                {
                    "ATestID": 16000004,
                    "AllTestID": 16000004,
                    "Title": "1/3已知x=1是函数y=x<sup>3</sup>+ax<sup>3</sup>的驻点，则常数a=（   ）.",
                    "Explain": "由已知得，y' = 3x<sup>2</sup> + 2ax，则y'(1) = 3 + 2a = 0， 故 a = -3/2。",
                    "TestPoint": "略",
                    "SelectedItems": [
                        {
                            "ItemName": "A",
                            "Content": "0"
                        },
                        {
                            "ItemName": "B",
                            "Content": "1"
                        },
                        {
                            "ItemName": "C",
                            "Content": "-3/2"
                        },
                        {
                            "ItemName": "D",
                            "Content": "3/2"
                        }
                    ],
                    "Answer": "C",
                    "IsFav": 0,
                    "UserNoteContent": "这题真好"
                },{
                    "ATestID": 16000005,
                    "AllTestID": 16000005,
                    "Title": "设随机变量X～N(1,1)，概率密度为f(x)，分布函数F(x)，则下列正确的是（   ）。",
                    "Explain": "由X~N(1,1)，所以X的密度函数关于x=1对称，故有P(X<=1) = P(x>=1) = 1/2，故（B）",
                    "TestPoint": "略",
                    "SelectedItems": [
                        {
                            "ItemName": "A",
                            "Content": "P(x<=0) = P(x>=0)"
                        },
                        {
                            "ItemName": "B",
                            "Content": "P(x<=1) = P(x>=1)"
                        },
                        {
                            "ItemName": "C",
                            "Content": "f(x) = f(-x), x&isin;R"
                        },
                        {
                            "ItemName": "D",
                            "Content": "f(x) = 1 - F(-x), x&isin;R"
                        }
                    ],
                    "Answer": "B",
                    "IsFav": 0,
                    "UserNoteContent": "这题真好"
                },{
                    "ATestID": 16000006,
                    "AllTestID": 16000006,
                    "Title": "设f(x)的一个原函数为10<sup>x</sup>，则f'(x)=（  ）",
                    "Explain": "因f(x)的一个原函数为10<sup>x</sup>，(10)' = 10<sup>x</sup>ln10 = f(x)，故f(x) = 10<sup>x</sup>(ln10)<sup>2</sup>。",
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                    "SelectedItems": [
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                            "ItemName": "A",
                            "Content": "10<sup>x</sup>"
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                        {
                            "ItemName": "B",
                            "Content": "10<sup>x</sup>&sdot;ln10"
                        },
                        {
                            "ItemName": "C",
                            "Content": "10<sup>x</sup>"
                        },
                        {
                            "ItemName": "D",
                            "Content": "10<sup>x</sup>&sdot;(ln10)<sup>3</sup>"
                        }
                    ],
                    "Answer": "C",
                    "IsFav": 0,
                    "UserNoteContent": "这题真好"
                },{
                    "ATestID": 16000007,
                    "AllTestID": 16000007,
                    "Title": "一袋中有四只球，编号为1，2，3，4，从袋中一次取出两只球，用x表示取出的两只球的最大号码数，则p{x=4}=（ ）",
                    "Explain": "略",
                    "TestPoint": "略",
                    "SelectedItems": [
                        {
                            "ItemName": "A",
                            "Content": "0.4"
                        },
                        {
                            "ItemName": "B",
                            "Content": "0.5"
                        },
                        {
                            "ItemName": "C",
                            "Content": "0.6"
                        },
                        {
                            "ItemName": "D",
                            "Content": "0.7"
                        }
                    ],
                    "Answer": "B",
                    "IsFav": 0,
                    "UserNoteContent": "这题真好"
                },{
                    "ATestID": 16000008,
                    "AllTestID": 16000008,
                    "Title": "设随机变量X~N(1,4)，Y~U(0,4)，且X,Y相互独立，则D(2X-3Y)= （）",
                    "Explain": "因为X与Y独立，所以D(2X - 3Y) = 4DX + 9DY = 4 * 4 + 9 * 4<sup>2</sup> / 12 = 28",
                    "TestPoint": "略",
                    "SelectedItems": [
                        {
                            "ItemName": "A",
                            "Content": "8"
                        },
                        {
                            "ItemName": "B",
                            "Content": "18"
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                        {
                            "ItemName": "C",
                            "Content": "24"
                        },
                        {
                            "ItemName": "D",
                            "Content": "28"
                        }
                    ],
                    "Answer": "D",
                    "IsFav": 0,
                    "UserNoteContent": "这题真好"
                }
            ]
        }
    ]
};